| 摘要 |
<p>In order to temporarily immobilize a propelling member and prevent said member from falling off by means of a simple structure, this tensioner is provided with: a guide member (3) that extends in the same direction as the axial direction of the propelling member (2); a guide hole (6) formed in the guide member (3) in such a manner as to extend in the axial direction of the propelling member (2), with both ends closed in the longitudinal direction; an engaging recess (11) formed in the guide hole (6); and an engaging protrusion (12) that is inserted in the guide hole (6), enabling the guide member (3) to slide in a relative manner, locks the back and forth movement of the propelling member (2) via the guide member (3) by engaging with the engaging recess (11), and permits the back and forth the movement of the propelling member (2) via the guide member (3) by disengaging from the engaging recess (11).</p> |
